Slides in shares of Caterpillar and those of Boeing, down 1.9 per cent and 1.4 per cent respectively, paced the decline in the Dow.
In Europe, the Stoxx 600 finished the session with a 1.5 per cent drop from the previous close. The UK's FTSE 100 Index fell 1 per cent, Germany's DAX retreated 1.3 per cent, while France's CAC 40 slumped 1.8 per cent.
The IMF slashed its global economic growth forecast to 3.3 per cent for this year and 3.8 per cent for 2015, from its July estimates for 3.4 and 4 per cent, respectively.
"Downside risks have increased since the spring," the IMF said in its World Economic Outlook report. "Short-term risks include a worsening of geopolitical tensions and a reversal of recent risk spread and volatility compression in financial markets. Medium-term risks include stagnation and low potential growth in advanced economies and a decline in potential growth in emerging markets."
"Downside risks related to an equity price correction in 2014 have also risen, consistent with the notion that some valuations could be frothy," according to the IMF.
Investors are eyeing the US third-quarter earnings season, which unofficially begins when Alcoa reports earnings after the market close on October 8.
"We don't have earnings data to drive us yet this week and let's face it, that's the meat and potatoes of the market," Karyn Cavanaugh, the New York-based senior market strategist at Voya Investment Management, told Bloomberg News.
Meanwhile, Rio Tinto rejected a takeover offer from Glencore, made in July, that would have created the world's largest miner. Glencore said it may renew its courtship of Rio but not for six months as required by UK law.
"The pressure is on Rio now," Chris LaFemina, a mining analyst at Jefferies, said in a report, Bloomberg reported. "If Rio management does not deliver material capital returns to shareholders, as promised, or if the iron ore price sharply falls next year, Rio could become much more vulnerable."